Assigitoe of



(No Model.)

' v 2 Sheets-Sheet 1. P. D. WITHBRELL.

PAPER CUTTING MACHINE.

No. 353,045. I Patented Nov. 23, 1886.

WITNEEEIEEQ (No Model.) 2 sheets-sheet F. D. WITHERELL.

PAPER CUTTING MACHINE, No. 353,045. Patented Nov. 23, 1886..

WITNEEIEEE. INVENTEI r1 N. PETERS. Phom-Limu her, Washinglan. n C

NITED STATES PATENT CFF cE. I

FRANK D. WITHERELL, OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR OF ONEHALF TOBENJ. F. DE COSTA, OF SAME PLACE.

PAPER-CUTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 353.0%5, dated November23, 1886.

' Application filed May 24, less. Serial No. 203,0s2. (No model.)

To all whom it may concern:

Be it known that I, FRANK D. WITHER-ELL, of Cambridge, in the county of"Middlesex and State'of Massachusetts, a citizen of the United States,have invented a new and useful Improvement in Paper-Cutting Machines,.of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forminga part of thisspeci fication, in explaining its nature.

The object of the invention is to provide a paper-cutting machine with apressure bar or block automatically moved upon the paper to clamp it tothe bed to hold it thereon while the cutter is operated, and to themechanism whereby this result is accomplished.

In the drawings, Figure 1 is a view of the machine in front elevation.Fig. 2-is a right side elevation thereof. Fig. 3 is a side elevationshowing the parts in'a different position from that shown in Fig. 2.Fig. 4 is a vertical central section of the machine.

A A are the side frames of the machine.

B is the bed.

C is a preSSer-bar, arranged tobe moved vertically in relation to thebed, as hereinafter described, in suitable guides, 0,-on or in theframes A A.

D is a cutter, which is provided with a reciprocating movement after thepressure block or bar has been moved upon the paper, as hereinafterspecified. It is supported by a swinging block, 1, the ends of whichextend through guides d in the said frames A A of the machine, and eachend has a recess, 61 which receives a cross-stud, d attached to a yoke,(1*, Each of these yokes has attached at its lower end the pitmau E,which connects it with the eccentric e on the inner side of thegear-wheel F. This gear-wheel has a bearing upon the shaft or spindlef,being free to re-/ volve thereon or fixed to revolve therewith; andthere is also attached to the same spindle or shaft f the gear-wheel G,having the exter- The internal teeth, do not.

dicated. Between the internal teeth, 9, and the gear G is a pinion, H,mounted on a pin or stud, 71, extending from the front end of theleverh. Therear end of each lever h is connected by means of the bar or rodif with the pressure-block. This pinion is adapted to be moved or turnedwith the gear G until the pressure-block comes to rest upon the paper,when its motion is arrested, and the continued movement of the gearcauses it to be revolved, and in turn to revolve the gear F, and this ofcourse causes the eccentric to be revolved and the cutter to bereciprocated. At the end of the movement of the cutter the pinion H,becomingdisengaged from the teeth g by the continned-movement of thegear G, falls bygravity sufficiently'far to lift the pressure-block. Aspring or yielding arm, M, attached to the gear G, and arranged to bearagainst the pin or stud supporting the pinion, may be used for thepurpose of lifting it until the pressureblock shall bear upon the paperto be out, and for holding it there until the internal gear, 9, beginsto mesh therewith. It will' beseen that by this construction thepressure block is placed upon the paper automatically, and in advance ofthe cutter; and is held thereon dur ing the movement of the cutter, andis then automatically moved upward after the completion of the operationof the cutter, to release the paper, and that this action takes placeregardless of the thickness of the stack of paper to be out. 7

In order to quicken the falling action of the pinion after the internalgear, 9, becomes disengaged therefrom, the end of the lever bearing itmaybe provided with a weight sufficient to cause it to drop more quicklythan it other- Wise would; and for lifting the spring oryielding arminto position to bring the pressure- 9o block upon the paper before theoperation of the cutter I may use, in addition to the yielding or springarm, if desired, or without it, if preferred, an arm or r'od, N,extending downward from each of the arms h' of .the lever h, 5 and whichmay be extensions of side rods, 72?, and to the lower end of which'isattached a horizontal extension or arm, a, carrying a footrest, a; andit will be seen that by a downward movement of this foot-restthepressurezoo block is brought into contact with the paper, and thepinion H into proper position to be engaged by the teeth of the internalgear.

Having thus fully described my invention, I claim and desire to secureby Letters Patent of the United States-- 1. The combination, in apaper-cutting niaehine, of a pressure-block, the levers connectedtherewith, each bearing apinion, H, mounted upon one arm thereof, thegears G, having internal teeth, 9, arranged to mesh with the pinion, thegears F, adapted to be revolved by the pinions H, andhaving theeccentrics 6 connected with the block or head carrying a cutter,substantially as described.

2. The combination of the main shaft of the machine, the pinion 9",carried thereby, the gear G, having external teeth, 9, internal teeth,g, the gear F, having the eccentric a connected with the cross-headcarrying the cutter-knife, the pinion H, arranged between the internalgear, g, and the gear G upon the end of thelever h, and the lever h,connected with the pressure-bar by the rod h, all substantially asdescribed.

3. The combination of the pinion H, carried upon the end of the lever h,connected with the pressure'block C, with the gear G, having a spring oryielding arm, M, for lifting it to a position to bring thepressure-block in contact with the paper to be cut before the internalgear,g,is caused to mesh with the pinion, substantially as described.

, FRANK D. XVITIIERELL.

\Vitnesses:

F. F. RAYMOND, 2d, J. M. DOLAN.

